This is a RiveScript interpreter for the Python programming language. RiveScript is a scripting language for chatterbots, making it easy to write trigger/response pairs for building up a bot's intelligence.

This library is compatible with both Python 2 and Python 3.

The rivescript module can be executed as a stand-alone Python script, or included in other Python code. When executed directly, it launches an interactive chat session:

python -m rivescript ./brain

When used as a library, the synopsis is as follows:

from rivescript import RiveScript

bot = RiveScript()
bot.load_directory("./brain")
bot.sort_replies()

while True:
    msg = raw_input('You> ')
    if msg == '/quit':
        quit()

    reply = bot.reply("localuser", msg)
    print 'Bot>', reply

The scripts example.py and example3.py provide simple examples for using RiveScript as a library for Python 2 and 3, respectively.

Version 1.05 adds experimental support for UTF-8 in RiveScript. It is not enabled by default. Enable it by passing a True value for the utf8 option in the constructor, or by using the --utf8 (or -u for short) option to the interactive mode.

By default (without UTF-8 mode on), triggers may only contain basic ASCII characters (no foreign characters), and the user's message is stripped of all characters except letters/numbers and spaces. This means that, for example, you can't capture a user's e-mail address in a RiveScript reply, because of the @ and . characters.

When UTF-8 mode is enabled, these restrictions are lifted. Triggers are only limited to not contain certain metacharacters like the backslash, and the user's message is only stripped of backslashes and HTML angled brackets (to protect from obvious XSS if you use RiveScript in a web application). The <star> tags in RiveScript will capture the user's "raw" input, so you can write replies to get the user's e-mail address or store foreign characters in their name.

Regardless of whether UTF-8 mode is on, all input messages given to the bot are converted (if needed) to Python's unicode data type. So, while it's good practice to make sure you're providing Unicode strings to the bot, the library will have you covered if you forget.

The rivescript package, when run stand-alone, supports "JSON Mode", where you communicate with the bot using JSON. This is useful for third-party programs that want to use RiveScript but don't have an interpreter in their native language.

Just run it like: python rivescript --json /path/to/brain

Print a JSON encoded data structure into the standard input. The format should look like this:

{
	"username": "localuser",
	"message": "Hello bot!",
	"vars": {
		"name": "Aiden"
	}
}

After sending this, you can send an EOF signal and the bot will respond with a JSON response and then exit. Or, you can keep the session open, by sending the string __END__ on a line by itself after your input. The bot will do the same when it responds, so you can reuse the same pipe for multiple interactions.

The bot's response will be formatted like so:

{
	"status": "ok",
	"reply": "Hello, human!",
	"vars": {
		"name": "Aiden"
	}
}

The status will be ok on success, or error if there was an error. The reply is the bot's response (or an error message on error).

The Python RiveScript interpreter is dual licensed. For open source applications the module is licensed using the GNU General Public License, version 2. If you'd like to use the Python RiveScript module in a closed source or commercial application, contact the author for more information.

RiveScript-Python
Copyright (C) 2013 Noah Petherbridge

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

The official RiveScript website, http://www.rivescript.com/